MY153675A - Variable valve actuator with a pneumatic booster - Google Patents

Variable valve actuator with a pneumatic booster

Info

Publication number
MY153675A
MY153675A MYPI20094244A MYPI20094244A MY153675A MY 153675 A MY153675 A MY 153675A MY PI20094244 A MYPI20094244 A MY PI20094244A MY PI20094244 A MYPI20094244 A MY PI20094244A MY 153675 A MY153675 A MY 153675A
Authority
MY
Malaysia
Prior art keywords
rod
operably connected
pneumatic
pneumatic cylinder
pneumatic booster
Prior art date
Application number
MYPI20094244A
Inventor
Lou Zheng
Original Assignee
Scuderi Group Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scuderi Group Inc filed Critical Scuderi Group Inc
Publication of MY153675A publication Critical patent/MY153675A/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/16Pneumatic means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423Details relating to the hydraulic feeding circuit
    • F01L2001/34446Fluid accumulators for the feeding circuit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L2003/25Valve configurations in relation to engine
    • F01L2003/258Valve configurations in relation to engine opening away from cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00Arrangements solving specific problems in relation with valve gears
    • F01L2810/05Related to pressure difference on both sides of a valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/18Means for increasing the initial opening force on the valve
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S137/00Fluid handling
    • Y10S137/906Valves biased by fluid "springs"
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/87096Valves with separate, correlated, actuators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
  • Lift Valve (AREA)
  • Fluid-Driven Valves (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

AN ACTUATOR IS DESCRIBED THAT INCLUDES A DRIVER (30, 130) INCLUDING A HOUSING DEFINING A LONGITUDINAL AXIS (116), AN ACTUATION MECHANISM CAPABLE OF GENERATING ACTUATION FORCE IN A FIRST LONGITUDINAL DIRECTION, AND A ROD WITH ONE END OPERABLY CONNECTED WITH AT LEAST ONE PART OF THE ACTUATION MECHANISM AND WITH THE OTHER END OPERABLY CONNECTED WITH A LOAD SUCH AS AN ENGINE VALVE; AT LEAST ONE RETURN SPRING (72) OPERABLY CONNECTED WITH THE ROD THROUGH A SPRING RETAINER ASSEMBLY AND BIASING THE ROD IN THE SECOND DIRECTION; AND A PNEUMATIC BOOSTER (85) FURTHER INCLUDING A PNEUMATIC CYLINDER (84), A PNEUMATIC PISTON (78, 80, 80B) OPERABLY CONNECTED WITH THE ROD THROUGH THE SPRING RETAINER ASSEMBLY AND BIASING THE ROD IN THE FIRST DIRECTION, A CHARGE MECHANISM PROVIDING A CONTROLLED FLUID COMMUNICATION BETWEEN THE PNEUMATIC CYLINDER (84) AND A HIGH PRESSURE GAS SOURCE, AND A BLEED MECHANISM PROVIDING A CONTROLLED FLUID COMMUNICATION BETWEEN THE PNEUMATIC CYLINDER (84) TO A LOW-PRESSURE GAS SINK.
MYPI20094244A 2007-04-16 2007-10-04 Variable valve actuator with a pneumatic booster MY153675A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/787,295 US7536984B2 (en) 2007-04-16 2007-04-16 Variable valve actuator with a pneumatic booster

Publications (1)

Publication Number Publication Date
MY153675A true MY153675A (en) 2015-03-13

Family

ID=39852571

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI20094244A MY153675A (en) 2007-04-16 2007-10-04 Variable valve actuator with a pneumatic booster

Country Status (13)

Country Link
US (3) US7536984B2 (en)
EP (1) EP2134935B1 (en)
JP (1) JP5222938B2 (en)
KR (3) KR101121177B1 (en)
CN (1) CN101675216B (en)
AU (1) AU2007351850B2 (en)
BR (1) BRPI0721615A2 (en)
CA (1) CA2684322A1 (en)
MX (1) MX2009010900A (en)
MY (1) MY153675A (en)
RU (1) RU2439339C2 (en)
WO (1) WO2008130374A2 (en)
ZA (1) ZA200907637B (en)

Families Citing this family (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7536984B2 (en) * 2007-04-16 2009-05-26 Lgd Technology, Llc Variable valve actuator with a pneumatic booster
KR101128473B1 (en) 2007-08-13 2012-03-23 스쿠데리 그룹 엘엘씨 Pressure balanced engine valves
EP2313627A2 (en) * 2008-06-16 2011-04-27 Planetary Rotor Engine Company Planetary rotary engine
FR2945333B1 (en) * 2009-05-05 2015-08-07 Air Liquide VALVE WITH BELLOW SUITABLE FOR USE IN CRYOGENIC
US8763571B2 (en) * 2009-05-07 2014-07-01 Scuderi Group, Inc. Air supply for components of a split-cycle engine
US8272357B2 (en) * 2009-07-23 2012-09-25 Lgd Technology, Llc Crossover valve systems
US8925502B1 (en) * 2010-01-22 2015-01-06 Brp Us Inc. Hydraulically actuated valve assembly for an engine
WO2011159756A1 (en) 2010-06-18 2011-12-22 Scuderi Group, Llc Split-cycle engine with crossover passage combustion
US8833315B2 (en) 2010-09-29 2014-09-16 Scuderi Group, Inc. Crossover passage sizing for split-cycle engine
KR20130111560A (en) 2010-10-01 2013-10-10 스쿠데리 그룹, 인크. Split-cycle air hybrid v-engine
CN102537370B (en) * 2010-12-15 2015-08-12 中国航空工业集团公司沈阳发动机设计研究所 A kind of stepless adjustable mechanical servo switch bleed valve
JP2014508241A (en) * 2011-01-27 2014-04-03 スクデリ グループ インコーポレイテッド Variable force valve spring
CA2825804A1 (en) 2011-01-27 2012-08-02 Scuderi Group, Inc. Lost-motion variable valve actuation system with cam phaser
CN103443408A (en) 2011-01-27 2013-12-11 史古德利集团公司 Lost-motion variable valve actuation system with valve deactivation
SE535886C2 (en) * 2011-06-03 2013-02-05 Ase Alternative Solar Energy Engine Ab Pressure Pulse Generator
CN202202910U (en) * 2011-08-23 2012-04-25 靳北彪 Gas distribution mechanism for sliding cylinders
US9109468B2 (en) 2012-01-06 2015-08-18 Scuderi Group, Llc Lost-motion variable valve actuation system
FI20125250L (en) * 2012-03-09 2013-09-10 Waertsilae Finland Oy Gas exchange valve arrangement and gas exchange valve
CN102620037B (en) * 2012-03-30 2013-06-05 烟台卡伦特机械制造有限公司 Integrated pressure regulating switching valve
US8904981B2 (en) 2012-05-08 2014-12-09 Caterpillar Inc. Alternating split cycle combustion engine and method
SE536617C2 (en) * 2012-06-28 2014-04-01 Cargine Engineering Ab Method and positioning sensor composition for determining a mutual position between a first object and another object
SE543886C2 (en) * 2012-07-06 2021-09-14 Freevalve Ab Actuator for axial displacement of a gas exchange valve at an internal combustion engine
CN103967762B (en) * 2013-02-01 2016-03-16 陈镇汉 A kind of compressor tolerance regulates hydraulic actuator
EP2971636A1 (en) 2013-03-15 2016-01-20 Scuderi Group, Inc. Split-cycle engines with direct injection
TWI551799B (en) * 2013-08-23 2016-10-01 Gudeng Prec Ind Co Ltd Pneumatic valve structure and the application of the inflatable seat and inflatable counters
SE537454C2 (en) * 2013-10-16 2015-05-05 Freevalve Ab Combustion engine and gas management system for pneumatic operation of a valve actuator
SE540359C2 (en) * 2013-10-16 2018-08-07 Freevalve Ab Internal combustion engine
KR101412175B1 (en) * 2013-11-27 2014-06-25 동명산업(주) Improved apparatus for opening and closing valve
CN103672125B (en) * 2013-12-25 2016-01-20 中国船舶重工集团公司第七�三研究所 Baffle valve device
US9399933B2 (en) * 2014-02-28 2016-07-26 Plymouth Machine Integration, Llc Valve assembly
EP3126643B1 (en) * 2014-03-06 2018-01-03 Wärtsilä Finland Oy Gas exchange valve arrangement
FR3021363B1 (en) * 2014-05-21 2019-05-03 Safran Aircraft Engines IMPROVED FLOW CONTROL DEVICE HAVING REDUCED MASS
FR3021347B1 (en) * 2014-05-22 2016-05-20 Motor Dev Int S A COMPRESSED AIR MOTOR WITH ACTIVE CHAMBER INCLUSIVE AND ACTIVE DISTRIBUTION AT ADMISSION
CN105298544A (en) * 2014-11-01 2016-02-03 熵零股份有限公司 Control system for congenetic fluid
CN104481627B (en) * 2014-12-08 2017-02-22 广西玉柴机器股份有限公司 Pneumatic valve
US9625050B2 (en) * 2015-01-26 2017-04-18 Ningbo Hoyea Machinery Manufacture Co., Ltd. Engine valve actuation system
CN104632317A (en) * 2015-01-30 2015-05-20 哈尔滨工程大学 Vent valve device for high-power low-speed marine diesel engine
MD4432C1 (en) * 2015-07-23 2017-03-31 Олег ПЕТРОВ Device for controlling the valve timing and the valve lift of the gas-distributing mechanism (embodiments)
MD4433C1 (en) * 2015-07-23 2017-03-31 Олег ПЕТРОВ Device for controlling the valve timing and the valve lift of the gas-distributing mechanism (embodiments)
CN106499456A (en) * 2015-09-08 2017-03-15 熵零股份有限公司 A kind of external-open charge valve and its electromotor
US10648357B2 (en) * 2015-10-02 2020-05-12 Elliott Company Pneumatic trip valve partial stroking arrangement
RU2625415C2 (en) * 2015-11-11 2017-07-13 Закрытое акционерное общество "Научно-производственное объединение "Аркон" Mechanism of gas distribution of internal combustion engine piston
SE540733C2 (en) 2016-06-15 2018-10-23 Scania Cv Ab Internal combustion engine and vehicle comprising a hydraulic phase displacement device
CN105972251B (en) * 2016-07-14 2018-05-18 康以宣 For the diaphragm and Pneumatic three-way valve of Pneumatic three-way valve
KR101703840B1 (en) 2016-09-27 2017-02-07 국방과학연구소 Performance and reliability test apparatus for pyrotechnic mechanical device under high gas pressure
CN106703928B (en) * 2016-12-28 2022-07-15 沪东重机有限公司 Exhaust valve control execution system directly driven by servo oil
FR3066548B1 (en) * 2017-05-16 2019-07-12 Safran COMBUSTION SYSTEM WITH CONSTANT VOLUME
EP3441622B1 (en) 2017-08-12 2020-04-22 Hamilton Sundstrand Corporation Pneumatic servovalve assembly
CN107701338B (en) * 2017-09-30 2019-03-22 中国北方发动机研究所(天津) A kind of efficient gas handling system suitable for high speed engine
FR3071869B1 (en) 2017-10-02 2019-10-11 Vianney Rabhi HYDRAULIC REGENERATION VALVE ACTUATOR
US10704431B2 (en) 2017-10-03 2020-07-07 Vianney Rabhi Regenerative valve hydraulic actuator
CN107842642B (en) * 2017-12-12 2024-04-02 大连亨利测控仪表工程有限公司 High-efficiency cut-off type single-action pneumatic actuating mechanism
KR102067686B1 (en) * 2018-07-30 2020-01-20 김보경 System for testing a transformer
CN112996987B (en) * 2018-08-23 2022-12-27 沃尔沃卡车集团 Cylinder valve assembly with valve spring breather
US10754362B1 (en) * 2019-02-20 2020-08-25 Fisher Controls International, Llc Adjustment of loop-powered pneumatic process control device interfaces
US11456681B2 (en) 2020-01-08 2022-09-27 Encite Llc Micro electrostatic actuated pneumatic driven motor
CN112123566A (en) * 2020-10-16 2020-12-25 王恺 Telescopic control device for clay dispersion device in screw mud production
AU2020476553A1 (en) * 2020-11-11 2023-06-15 Motor Development International S.A. Compressed-air engine with integrated active chamber and active distribution with balanced valve

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5166607U (en) * 1974-11-20 1976-05-26
US3949964A (en) * 1975-02-13 1976-04-13 Westinghouse Electric Corporation Electromechanically-operated valve
JPS6363512A (en) 1986-09-04 1988-03-19 Nippon Steel Corp Width control method for cold rolling
JPS6363512U (en) * 1986-10-17 1988-04-26
US4934652A (en) * 1989-12-11 1990-06-19 Otis Engineering Corporation Dual stage valve actuator
DE4039351A1 (en) 1990-12-10 1992-06-11 Pierburg Gmbh ELECTROMAGNETIC CONTROL VALVE FOR EXHAUST GAS RECIRCULATION
US5193495A (en) * 1991-07-16 1993-03-16 Southwest Research Institute Internal combustion engine valve control device
JP3182825B2 (en) 1991-12-13 2001-07-03 株式会社村田製作所 Composite varistor
US5253619A (en) * 1992-12-09 1993-10-19 North American Philips Corporation Hydraulically powered actuator with pneumatic spring and hydraulic latching
US5277222A (en) * 1993-02-23 1994-01-11 Caterpillar Inc. Pressure actuatable valve assembly
US5638781A (en) * 1995-05-17 1997-06-17 Sturman; Oded E. Hydraulic actuator for an internal combustion engine
JPH10274105A (en) 1997-03-28 1998-10-13 Nippon Soken Inc Egr control valve and exhaust gas recirculation device using the valve
DE19806520A1 (en) * 1998-02-17 1999-08-19 Ruediger Haaga Gmbh Process for sterilization, filling and sealing of product container using low pressure plasma as sterilizing agent
JPH11311112A (en) * 1998-03-14 1999-11-09 Fev Motorentechnik Gmbh & Co Kg Electromagnetic operable gas exchange valve for piston internal combustion engine equipped with air return spring
GB2340881B (en) 1998-08-19 2000-07-19 Benzion Olsfanger An internal combustion engine
US6230742B1 (en) * 1999-10-21 2001-05-15 Delphi Technologies, Inc. Poppet valve assembly apparatus having two simultaneously-seating heads
GB0007918D0 (en) * 2000-03-31 2000-05-17 Npower Passive valve assembly
GB2374900B (en) * 2001-04-24 2004-09-01 Ilmor Engineering Ltd Valve spring mechanism
US6584885B2 (en) * 2001-06-12 2003-07-01 Visteon Global Technologies, Inc. Variable lift actuator
US6543225B2 (en) 2001-07-20 2003-04-08 Scuderi Group Llc Split four stroke cycle internal combustion engine
JP3875959B2 (en) 2003-03-27 2007-01-31 泰彦 渡辺 Flow control valve
GB2402169B (en) 2003-05-28 2005-08-10 Lotus Car An engine with a plurality of operating modes including operation by compressed air
MY138166A (en) * 2003-06-20 2009-04-30 Scuderi Group Llc Split-cycle four-stroke engine
CN1287069C (en) * 2003-11-27 2006-11-29 宁波华液机器制造有限公司 Pressure differential style air valve variation control system
US7228826B2 (en) * 2003-12-23 2007-06-12 Caterpillar Inc Internal combustion engine valve seating velocity control
SE531265C2 (en) * 2006-01-16 2009-02-03 Cargine Engineering Ab Method and apparatus for driving a valve to the combustion chamber of an internal combustion engine, and an internal combustion engine
US7536984B2 (en) * 2007-04-16 2009-05-26 Lgd Technology, Llc Variable valve actuator with a pneumatic booster

Also Published As

Publication number Publication date
BRPI0721615A2 (en) 2014-03-18
JP5222938B2 (en) 2013-06-26
MX2009010900A (en) 2010-02-17
EP2134935A2 (en) 2009-12-23
CN101675216B (en) 2012-09-26
US8051812B2 (en) 2011-11-08
US20080251041A1 (en) 2008-10-16
US7536984B2 (en) 2009-05-26
KR20110091011A (en) 2011-08-10
CA2684322A1 (en) 2008-10-30
ZA200907637B (en) 2010-07-28
KR101215986B1 (en) 2012-12-27
AU2007351850A1 (en) 2008-10-30
JP2010525215A (en) 2010-07-22
EP2134935B1 (en) 2012-08-08
US20090133648A1 (en) 2009-05-28
WO2008130374A3 (en) 2008-12-31
RU2009137410A (en) 2011-05-27
AU2007351850B2 (en) 2011-11-17
KR20110091772A (en) 2011-08-12
CN101675216A (en) 2010-03-17
WO2008130374A2 (en) 2008-10-30
US8146547B2 (en) 2012-04-03
EP2134935A4 (en) 2011-09-07
KR101215988B1 (en) 2012-12-27
KR20090132595A (en) 2009-12-30
KR101121177B1 (en) 2012-03-23
RU2439339C2 (en) 2012-01-10
US20100126442A1 (en) 2010-05-27

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